SU1295203A1 - Planimeter - Google Patents

Abstract

The invention relates to a measurement technique and can be used in geology, topography, mining and construction to determine the area of flat figures and the length of lines. The aim of the invention is to make it possible to measure the length of the lines by moving the center to cross over the bypass glass at a predetermined distance from the line to be measured along a closed loop. The planimeter measures the area by figuratively moving the center of the bypass glass 10 along the contour 16 with the counting area using the counting mechanism 13. When measuring the length of the line, the bypass glass 10 is moved so that the mark made in the form of a circle constantly touches the measured line and the center is crossed described a closed loop. The length of the measured line is determined by dividing the indication of the counting mechanism by the value of the diameter of the mark. 3 il. I (L

Description

The invention relates to a measurement technique and can be used in geology, topography, mining and construction to determine the area of flat figures and the length of lines,

The purpose of the invention is to provide the possibility of measuring the length of lines.

FIG. 1 shows a planimeter diagram; in FIG. 2, a bypass glass; in fig. 3 is a circuit for measuring the length of a line.

The planimeter includes a housing 1 with a guide 2, rollers 3 and 4 fixed at its ends, carriage 5, rod 6 fixed to it with rollers 7 and 8 at the ends, and carriage 9 fixed on it at rod 6; the bypass glass 10 with a crosshair 11 in the center and with a mark 12, made in the form of a circle with a center coinciding with the center of the cross 11 and a multiple of ten, and mounted on the carriage 5 a countable mechanism 13, kinematically connected with cables 14 and 15, covering rollers 3, 4 and 7, 8 with carriages 5 and 9.

The planimeter works as follows.

When measuring the front part of the figure, the center of the overlap AND the bypass glass 10 is moved along the contour 16, and the counting mechanism 13 counts the area bounded by the contour 16 of the flat figure.

When measuring the length of the line AB, the bypass glass 10 is set to its original position so that the mark 12 touches the measured line AB in it at: - the start point A. Move the bypass glass 10 along the line AB to point B so that the mark 12 moves relative to

to line AB, i.e. the center of the mark 12 is moved along the curve .CD. Then move

four

five

ABOUT

0

five

the glass bypass 0 is normal to the DE line to the AB line, so the mark 12 refers to the AB line with a diametrically opposite point. The bypass glass 10 is moved along the line BA to the point A so that the mark 12 moves relative to the line AB, and its center moves along the line EF. Finally, the bypass glass 10 returns to its original position along the normal to the line AB to the line AB. glass describes the contour of the CDEF, and the counting mechanism 13 fixes its area. The width of the contour CDEF is equal to the diameter of the mark 12. If the diameter of the mark is, for example, 10 mm; then, to determine the length of the AB line, the reading of the counting mechanism 13 must be divided by ten. Selecting a circle diameter of 10 multiple simplifies the calculations.

Formula and Gain

A planimeter comprising a body with a guide, rollers mounted on its ends, mounted on a guide carriage, a shaft mounted on it with one end with rollers on the ends, the axis of symmetry of which is perpendicular to the axis of symmetry of the guide, mounted on the shaft of a second carriage rigidly fixed on The second carriage has a bypass glass with a crosshair in the center and a counting mechanism mounted on the first carriage, kinematically connected with cables, covering the rollers, with a carriage, characterized in that The possibilities of measurement and the length of the lines, on one of the surfaces of the bypass glass, are made in the form of a circle with a center coinciding with the center of the cross and with a multiple of 10.

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Claims (1)

Claim A planimeter comprising a housing with a guide, rollers fixed on its ends, a carriage mounted on the guide, a rod fixed on it by one end with rollers on the ends, the axis of symmetry of which is perpendicular to the axis of symmetry of the guide, a second carriage mounted on the rod, bypass glass fixed to the second carriage with a crosshair in the center and a counting mechanism mounted on the first carriage, kinematically connected by means of cables covering the rollers, with carriages, characterized in that, in order to ensure Measurement and dyna lines, on one of the surfaces of the bypass glass a mark is made in the form of a circle with a center coinciding with the center of the crosshair and with a diameter multiple of 10.